Sofa



FIG. 1 is a frontal perspective view of the sofa showing my new design;

FIG. 2 is a right elevational view thereof, the left elevational view being identical;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a rear elevational view thereof. 

CLAIM The ornamental design of a sofa, as shown and described. 